Ascon Tecnologic - Y39W Line - Operating Instructions - Pag. 7
5.4
Outputs and Buzzer Configuration
The instrument outputs can be configured by the relative pa-
rameters
o.o1
,
o.o2
and
o.o3
. The outputs can be configured
for the following functions:
r1
To control the temperature control device of
loop 1
;
r2
To control the temperature control device of
loop 2
;
dF
To control the defrost device;
Fn
To manage the recirculation fans;
Au
To control the auxiliary device (see the Auxiliary output
functioning);
At
To control a silenceable alarm device through a con-
tact that is normally open and closed when in alarm;
AL
To control an alarm that cannot be silenced through a
contact that is normally open and closed when in alarm;
-t
To control a silenceable alarm device through a contact
that is normally closed, and then open when in alarm;
-L
To control an alarm that cannot be silenced through a
contact that is normally closed and open when in alarm;
on
Output ON when the instrument is in ON state. This
mode can be used to control lights, non-misting resist-
ance ON room door or other utilities;
oF
No function (output disabled).
If an outoput is configured as
Aux
(
o.o1
,
o.o2
,
o.o3
=
Au
), its
function is defined by the parameter
o.Fo
and conditioned by
the time set with parameter
o.tu
.
o.Fo
can be configured for the following functions:
oF
No function (Auxiliary output not active);
1.
Delayed from
r1
control output. The auxiliary output is
activated with the
o.tu
delay after the activation of the
output configured as
r1
. The output is then turned OFF
at the same time of the
r1
output. This mode can be
used as a command for a second compressor or for all
those working utilities operating as the
r1
output, but
which must be delayed after the compressor start up to
avoid excess electricity absorption.
2.
Delayed from
r2
control output. Similar to mode 1 func-
tioning mode but referred to
r2
.
3.
Activation by the key , or or by digital input with
contact NO: the output is activated pressing a key ,
, suitably configured with
t.UF
,
t.fa
or
t.Fb
=
1
or via
the digital input (
i.Fi
=
4
). These commands have a tog-
gle (bi-stable) function (the 1
st
key pressure activates the
output while the 2
nd
disables the output). In this functioning
mode, the
Aux
output can be turned OFF automatically
after a certain time that can be set with the parameter
o.tu
.
With
o.tu
=
oF
the output is activated and deactivated only
manually, using a key ( , , ) or the digital input. Dif-
ferently, the output, once activated, is turned OFF auto-
matically after the
o.tu
time. This mode of operation can
be used to control the shop window lighting, anti-fogging
resistors or other utilities.
4.
Internal Light output managed by digital input. The output
will be ON when door is opened (
i.Fi
=
5
,
6
).
The internal buzzer (when present) can be configured by
parameter
o.bu
to carry out the following functions:
oF
Buzzer always disabled;
1
The Buzzer sounds when an alarm is active;
2
The Buzzer sounds when a key pressed (does not signal
alarms);
3
The Buzzer sounds when a key pressed and when an
alarm is active.
5.5
Temperature Controllers
The type of control of both the loops is ON/OFF and acts
on the outputs configured as
r1
and
r2
depending on: the
probes measure (
Pr1,
r2
), the Set Points (
SP
,
SP2
), the dif-
ferentials (hysteresis)
r.d1
,
r.d2
and the action
r.Fc
.
By appropriately configuring the instrument, it is possible to
obtain a neutral zone controller, 2 independent controllers
in cooling mode, 2 independent controllers in heating mode
or two independent controllers: one in cooling mode and the
other in heating mode.
Depending on the function mode programmed with param-
eter
rfC
the relative differentials
r.d1
and
r.d2
are automati-
cally considered by the controller with
positive
values for
Cooling
actions (
r.fC
=
C
) or with
negative
values for
Heat-
ing
actions (
r.fC
=
H
).
The
r1
controller always has
Pr1
measurement as process
value while the
r2
controller can use, as process value, the
measurement of
Pr1
,
Pr2
or
Pr3
probes depending on the
value programmed at parameters
i.P2
and
i.P3
.
If one of
i.P2
/
i.P3
parameters is configured with a value
different than
r2
, the process value of
r2
controller is always
the
Pr1
probe measure. If instead
i.P2
or
i.P3
is configured
=
r2
the probe to which the parameter refers will be consid-
ered as process value for the
r2
controller.
When the neutral zone operating mode is selected, the pro-
cess value considered by the controller is only the
Pr1
probe
measurement (even if a probe is configured for
r2
operation).
Similarly, the Set Point value for the neutral zone operating
mode is always
SP1
while in all other cases, the
r1
controller
always have
SP1
as the Set Point value while the
r2
control-
ler always have
SP2
(remember that
SP2
can still be pro-
grammed as relative to
SP1
through the parameter
S.Sc
=
2r
).
Through parameter
r.Fc
it is possible to select the operating
mode of the two controllers in the following ways:
r.Fc
value
r1 Controller
r2 Controller
Action
SP
Process
value
Action
SP
Process
value
nr
Cool
SP1 Pr1
Heat
SP1
Pr1
CC
Cool
SP1 Pr1
Cool
SP2 or
(SP1 + SP2)
Pr1 or r2
probe
HH
Heat
SP1 Pr1
Heat
HC
Heat
SP1 Pr1
Cool
CH
Cool
SP1 Pr1
Heat
Neutral zone controller (Single Loop) -
r.Fc
= nr
In neutral zone operation (double action ON/OFF control) it is
possible to control the temperature of a system equipped with
both a cooling element (to be connected to the output con-
figured as
r1
) and a heating element (to be connected to the
output configured as
r2
), based on a single Set Point (
SP1
).
The controller behaves as follows: it switches OFF the ac-
tive output when
Pr1
process value reaches the
SP1
Set
Point and activates the
r1
output when the
Pr1
temperature
is greater than [
SP1
+
r.d1
], or it switches on the
r2
output
when the process value is less than [
SP1
-
r.d2
].
r.d1
r.d2
SP1
Temp.
time
r2
(heating)
r1
(cooling)
off
off
off
ON
ON
ON
Pr1
